Feed apparatus for internal-combustion engines



Oct. 22, 1929. F. WEINBERG FEED APPARATUS FOR INTERNAL COMBUSTION ENGINES Filed July 28. 1

atente d a. 22, 1929 7 1,732,251

NITED STATES PATENT OFFICE FREDERICK WEINBERG, OF DETROIT, MICHIGAN FEED APPARATUS FOR INTERNAL-COMBUSTION ENGINES Application filed July 28, 1920. Serial No. 399,619.

My invention relates to feed apparatus for is connected by a link h with the operating internal combustion engines. An object of arm of the throttle valve 9.

my invention is to provide a heating apparan is a conventional choke valve near the tus for the intake manifold to secure the abilentrance to the passage a 9' is a switch, an

ity to vary the degree of heat of the charge operating arm of which is connected with an in accordance with the requirements of the operating arm of the choke valve a.

motor at different speeds and loads. The k is a conduit leading upward from the charge requires the greatest amount of heat passage containing the nozzle 0 7c is a chamat the lower throttle opening, but at the her adjoining passage 6 thru which pas- 1 higher throttle opening less heat is required sage the hot exhaust gases pass. The conduit and should be applied to secure the best vol- 10 communicates at its upper end with the umetric efiiciency of the engine. Another obchamber k. is a pipe leading from the ject of my invention is to efficiently distribute chamber is and communicating at k with the the charge by increasing the intake manifold intake passage inside the choke n. k is an en- 15 surface and byproviding grooves in such largement of the conduit or pipe 70 65 surface. i is an electric heating means in the en- Still another object of my invention is to largement la". 9' is abattery or source of elecfacilitate easy starting by providing an electricity. When the choke nis closed the switch trically heated by-pass which however, only 7' is closed and the circuit thru the heating becomes operative upon closing the choke of Wire 7' is completed.

the carburetor. The operation of the above-described de- In the accompanying drawings vice is as follows: Fig. 1 is a sectional elevation of an appara- When the engine is started, the choke is tus embodying my invention. closed or partly closed and the circuit is 5 Fig. 2 is a view similar'to Fig. 1 illustrating completed thru the heating wire 3' There is a modified form. then a strong vacuum formed inthe intake Fig. 3 is a detail sectional view the section pipe which draws liquid fuel thru the conduit being taken on the line III-III Figure 1. is into the heating chamber is, thence thru a is the intake manifold to an internal the conduit 10 and past the heating wire 9' combustion engine having the intake pipe (1 so that the fuel is delivered to prime the en- 30 Z) is the exhaust manifold. b is a passage gine in a heated and readily vaporizable concommunicating at each end with the exhaust dition. When the engine has started the manifold b and passing around the intake choke a is opened and the circuit is broken. manifold a. b is the discharge, or exhaust The fuel is then drawn upward thru nozzle 5 pipe leading from the exhaust manifold 7) c in a well-known manner. In this positlon s5 and b is a heating jacket surrounding the the intake throttle g is nearly closed and the exhaust pipe 5 c is the carburetor having a exhaust valve h is closed and hot gasses are nozzle 0 extending upward into said intake forced thru the passage b to heat the intake pipe and provided at its upper end with a manifold a, the intake pipe a and the fuel 4.!) discharge aperture 0 chamber 70. Any operation of the intake g is the throttle valve in the intake manithrottle 9 causes the actuation of the exhaust fold. h is a throttle valve located in the exvalve it because they are connected by the haust pipe intermediate the ends of the paslink 72*, and when the inlet throttle is open sage o Thus when the throttle valve h is the exhaust valve is open and the exhaust 4.5 turned to obstruct the passage of the exhaust gas goes directly to b without heating the gases at the point at which it is located, said intake manifold appreciably. gases are forced thru the by-pass passage 5 In the modification of Fig. 2, I have shown to heat the incoming charge in the intake an aperture thru the wall of the intake pipe manifold a. V a and communicating with the chamber or 50 The operating arm of the exhaust valve h passage b, Thus the suction in the intake throttle is closed the valve h.

45 to the intake in inverse -m the intake manifold are automatically roduced by the vacuum in the intake mani old, i the latter being greatest when the throttle is closed and less as it opens. This sucks in a proportionate volume of the exhaust gases. To insure equal distribution of the fuel, .the inside walls of the intake manifold are provided with grooves y. Fi ure 3 shows a cross-section of the manifol for the four cylinder engine. The grooves form distrib- "29 uting channels leading to the ports of the respectiveintake valves. In this way each ,cylmder will draw its apportioned amount of fuel regardless of gas shifts which may be set up'in the manifold. In other'words,

25 the fuel or the air is handled separately and once the .fuel has precipitated on the walls and has found its way into the grooves, then it runs along the latter until it reaches its point of destination, that is, the cylinder.

What I claim is: 1. In an internal combustion engine having a multiplicity of combustion chambers communicating with the'fuel intake manifold having a valve-controlled inlet, an exhaust communicating with said combustion chambers having a main outlet and having a portion disposed in proximity the fuel intake so that the products of combustion in said portion will heat the intake, and means 40 disposed in the exhaust operatively co-ordinated with the movement of the valve in the inlet to the intake to increase the flow of exhaust products of combustion through that portion of the exhaust disposed in proximity roportion to the opening of said valve, and means in the intake leading from the inlet thereto to the oints of discharge into the separate combustion chambers adapted to direct the flow .50 of fuel condensing therein into the separate chambers.

2. In an internal combustion engine having amultiplicity of combustion chambers communicating with a fuel intake manifold having a main inlet and dischargeoutlets leading to the separate combustion chambers, said intake manifold having grooves formed on its surface leading from the inlet to the discharge outlets into. the separate 0 combustion chambers to direct the flow of fuel condensing ad'acent the inlet into sep arate combustion c ambers. 3. In an internal combustion engine, a fuel intake, an air intake leading to the fuel in- 6 take, a throttle valve in the fuel intake, a

from the carburetor to the choke valve in the air intake, an exhaust for products of combustion, a heater disposed in (proximity to the intaketo heat the same an communicating with the exhaust to receive the exhaust gases therefrom, a valve in said exhaust to direct the exhaust gases through said heater, said valve operatively connected with. the throttle valve to open and. close therewith, a bypass extending intake terminatin intermediate the throttle and the choke va ves, an electrical heater adapted to heat the fuel passing through the by-pass, said electrical heater. operatively connected with the choke valve for operation upon closing of the choke 4. In an internal combustion engine, an intake havin a fuel' inlet and an air inlet, a throttle valve in the intake, a chokevalve inthe air inlet, an exhaust for the products of combustion, a heater communicating with the exhaust to receive exhaust gases therefrom and disposed in proximity the intake 'to heat the same, a valve in the exhaust adapted to direct the flow of exhaust gases through said heater said valve operatively connected with the throttle valve to increase the flow of exhaust gases through the heater in inverse proportion to the opening of the throttlevalve, a heater to heat the eratively connected with the choke valve to be placed in the o erative position upon the closing. of the cho e valve and in the inoperative'position upon the opening thereof.

5. In an internal combustion engine, an

fuel pass-v ing through the intake which heater is opintake having a fuel inlet and an air inlet, Y

a throttle valve in the intake, a choke valve in the air'inlet, an'exhaust for the roducts of combustion, a heater communicating with.

the exhaust to receive exhaust ases therefrom and disposed in proximity t e intake to heat'the same, a valve in the exhaust adapted to direct the flow of exhaust gases through said'heater said valve operatively connected.

with the throttle valve to increase the flow of exhaust gases through the heater in inverse proportion .to the opening of the throttle valve, 2. secondar fuel inlet to the intake, a heater arrange to heat the fuel passing therethrough, said heater operativelaced in the operative position upon closmg of the choke and in the inoperative position upon the opening of the same.

' 6. The combination, in a multi-cylinder engine,'of a carburetor, an intake extending from the carburetor to the engine and provided with a'manifold structure communicating with the several cylinders of the engine, said intake provided with ribs extendmg gartly into the manifold structure and divi ing it into grooves leadng to the several cylinders, said grooves being in communication with each other.

connected with the choke. valve to be "Z? In an internal combustion en ine, a fuel intake, an air intake leading to t e fuel intake, a throttle valve in the fuel intake, a choke valve in the air intake, an exhaust for products of combustion, a heater disposed in proximity to the intake to heat the same and communicating w ith the exhaust to receive the exhaust gases therefrom, a bypass adjacent to said heater to receive the heat therefrom, extending from the carburetor and terminating intermediate the throttle and the choke valves into tlie intake passage for the purpose described.

' In testimony whereof I sign this specifica- 35 tion.

- FREDERICK .WEINBERG, 

